Abstract
THE morphogenesis of individual cell types can be studied in tissue culture: for example neuroblastoma cells can be induced to differentiate by a macromolecular factor released by cultured glioma cells1. On the other hand, survival and process formation in cell cultures of dissociated ganglia from embryonic chicks, newborn mice or rats require the presence of nerve growth factor2,6. An enriched population of non-neuronal cells can replace NGF in these systems and their effect can be impaired by addition of anti-NGF antibody2,3. The fact that NGF has been detected in the homogenate of solid tumours induced by subcutaneous injection of glioma cells previously grown in culture, and that a partially purified fraction of this homogenate induces morphological differentiation in neuroblastoma cells4 suggests that NGF and glial factor are the same molecule. We present evidence that NGF and glial factor are molecules with different properties and distinct specificities.
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MONARD, D., STOCKEL, K., GOODMAN, R. et al. Distinction between nerve growth factor and glial factor. Nature 258, 444–445 (1975). https://doi.org/10.1038/258444a0
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DOI: https://doi.org/10.1038/258444a0
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